Q. Recently, which institutions collaborated on developing the security alert system based on piezoelectric polymer nanocomposites?
Answer:
Centre for Nano and Soft Matter Sciences and National Chemical Laboratory (CSIR-NCL)
Notes: Researchers from CeNS and CSIR-NCL have developed a security alert system using piezoelectric polymer nanocomposites.
These polymers generate electric charges when subjected to pressure, converting mechanical energy into electrical energy.
They offer higher piezoelectric stress constants than ceramics, making them superior sensors. The polymers have low dielectric constants, low elastic stiffness, and low density, providing high voltage sensitivity and low acoustic and mechanical impedance, useful for medical and underwater applications. They are lightweight, flexible, and can be manufactured into large areas and complex shapes, with high dielectric breakdown and operating field strength.